concreto protendido

English translation: prestressed concrete

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Canadian Precast/Prestressed Concrete Institute
... Edition of the CPCI Metric Design Manual was published in 1987, there have been significant changes in the state of the art for precast, prestressed concrete. ... www.cpci.ca/?sc=publications - 14k - 6 Oct 2003 - Cached - Similar pages
[ More results from www.cpci.ca ]

PCAP
The Prestressed Concrete Association of Pennsylvania is a non-profit industry organization of prestressed concrete bridge beam manufacturers approved by the ... www.pcap.org/

Answers

14 mins confidence: peer agreement (net): +3

prestressed concrete

Explanation:Muitos exemplos e referências:

Canadian Precast/Prestressed Concrete Institute
... Edition of the CPCI Metric Design Manual was published in 1987, there have been significant changes in the state of the art for precast, prestressed concrete. ... www.cpci.ca/?sc=publications - 14k - 6 Oct 2003 - Cached - Similar pages
[ More results from www.cpci.ca ]

PCAP
The Prestressed Concrete Association of Pennsylvania is a non-profit industry organization of prestressed concrete bridge beam manufacturers approved by the ... www.pcap.org/

Post-tensioned concrete has steel tendons inside it, which are pulled tight after the concrete begins to harden. These tight steel tendons make the concrete stronger. For an example of how this works, imagine that you have a stack of books that you need to move. If you tie a string around them, they will stay together pretty well. But if you wrap a large rubber band or a bungee cord around them, the books will stay together much more tightly. The stretch of the elastic always pulls the books back together if they begin to separate. In the same way, the steel tendons pull the concrete together, so that forces on the concrete will not cause it to crack.

Using post-tensioning allows the concrete slabs to be thinner and the building columns to be spaced farther apart. This reduces the cost of materials enough that the extra effort of post-tensioning becomes worthwhile.